Bump grunt from 1.4.1 to 1.5.3

Bumps [grunt](https://github.com/gruntjs/grunt) from 1.4.1 to 1.5.3.
- [Release notes](https://github.com/gruntjs/grunt/releases)
- [Changelog](https://github.com/gruntjs/grunt/blob/main/CHANGELOG)
- [Commits](gruntjs/grunt@v1.4.1...v1.5.3)

---
updated-dependencies:
- dependency-name: grunt
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package-lock.json

@@ -14,7 +14,7 @@
     "build-watch": "grunt watch"
   },
   "devDependencies": {
-    "grunt": "~1.4.1",
+    "grunt": "~1.5.3",
     "grunt-checktextdomain": "~1.0.1",
     "grunt-contrib-compress": "~2.0.0",
     "grunt-contrib-cssmin": "~4.0.0",